Bonding of Metal Orthodontic Attachments to Sandblasted Porcelain and Zirconia Surfaces

Table 4

Descriptive statistics of tensile bond strengths for bonding agents in feldspathic group.

Bonding agents		Mean (MPa)	Std. deviation	Std. error	⁢95% confidence interval for mean
					⁢Lower bound	Upper bound
Reliance Assure plus	12	4.657	0.6020	0.1738	⁢4.275	5.040
Reliance Assure	12	4.724	0.7466	0.2155	⁢4.250	5.199
Porcelain Conditioner	12	4.339	0.7494	0.2163	⁢3.863	4.815
Total	36	4.574	0.7033	0.1172	⁢4.336	4.812